package com.hr.hrto.controller;

import com.hr.hrto.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

/**
 * Created with IntelliJ IDEA.
 *文件上传和下载
 * @Author: 黄瑞
 * @Date: 2022/07/07/15:49
 * @Description:
 * @version:1.0
 */
@RestController
@RequestMapping("/common")
@Slf4j
public class ComController {
    @Value("${reggie.path}")
    private String basePath;
    /**
     * 文件上传
     * @param file
     * @return
     */
    @PostMapping("/upload")
    public R<String> upload(MultipartFile file){
        //file文件是一个零时文件，需要转存到指定位置，否则本次请求完成后临时文件会删除
        log.info(file.toString());
        //原始文件名
        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));//后缀
        //使用uuid重新生成id
        String fileName = UUID.randomUUID().toString()+suffix;
        File dir = new File(basePath);
        if (!dir.exists()){
            //目录不存在，需要创建
            dir.mkdir();
        }
        try {
            file.transferTo(new File(basePath+fileName));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        return R.success(fileName);
    }
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){

        try {
            //输入流，通过输入流读取文件内容
            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));
            //输出流，将文件输出到页面
            ServletOutputStream outputStream = response.getOutputStream();
            response.setContentType("image/jepg");
            byte[] bytes = new byte[1024];
            int len =0;
            while ((len=fileInputStream.read(bytes))!=-1) {
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }
            outputStream.close();
            fileInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }



    }
}
